﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace SynchronizationContextWindowDemo
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        SynchronizationContext uiSynchronizationContext;

        public MainWindow()
        {
            InitializeComponent();
            uiSynchronizationContext = SynchronizationContext.Current;
            new Thread(Work).Start();

        }

        void Work() 
        {
            Thread.Sleep(5000);
            UpdateMessage("这...");
        }

        void UpdateMessage(string message) 
        {

            //等价于Dispatcher.BeginInvoke
            uiSynchronizationContext.Post(_ => tb_Input.Text = message, null);

            //等价于Dispatcher.Invoke
            //uiSynchronizationContext.Send(_ => tb_Input.Text = message, null);
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            new Thread(Work).Start();
        }


    }
}
